WhizKins

WPSimpleInsert is a plugin to insert custom code in your blog posts. It includes options to either add the code above 
or below post content.
Features:
<ul>
<li>Add custom HTML/PHP/JavaScript to your posts.</li>
<li>Ability to add custom code above or below post content.</li>
<li>Options to hide the code from certain pages like the home page and category and archives pages.</li>
</ul>

WP Simple Insert

A plugin to insert custom HTML or PHP code in your posts. Includes options to insert before or after post content.

brockangelo

Creating charts has never been easier. Heck, you’d almost call it fun.
This plugin allows the user to create and insert a Google Chart in just a few short clicks. Check out the <a href="http://brockangelo.com/wordpress/plugins/google-chart-generator/" rel="nofollow ugc">working online demo</a> to see for yourself.

Google Chart Generator

Allows the user to create and insert a Google Chart.

WP Simple Insert vs Google Chart Generator